Re: Unknown holes in the motherboard of the CBM610

On Wed, May 2, 2018 at 10:48 AM, Segher Boessenkool
<segher@kernel.crashing.org> wrote:

> Are we talking about LS devices here?  I totally missed that.

well usually all the PET era already begun into the LS reign. They
used 74S when speed and/or fanout was needed
and old original 74 family when the particular function was never
"ported" to S/LS (like 74177 for example).

>
> Another explanation for why the designers of this board did this, even
> with LS devices, is old habits die hard?  :-)

yes, either this or "what if one day I need to put a logic LOW there?"

Frank